Nasal septal perforation, fungal infection of the nose, and disturbances of taste and smell have been reported. Higher doses of mometasone may cause suppression of the body's ability to make its own natural glucocorticoid in the adrenal gland . People with suppression of their adrenal glands (which can be diagnosed by a doctor) would need increased amounts of glucocorticoids, probably by the oral or intravenous route, during periods of high physical stress or acute illness when glucocorticoids are particularly important. Intranasal steroids may cause growth suppression, weaken the immune system, and may increase the risk of glaucoma , and cataracts .
A total of 1008 patients aged 12 years and older received NASONEX Nasal Spray 50 mcg 200 mcg/day (n=506) or placebo (n=502) for 15 days. Adverse events that occurred more frequently in patients treated with NASONEX Nasal Spray 50 mcg than in patients with the placebo included sinus headache (% in NASONEX Nasal Spray 50 mcg group vs. % in placebo) and epistaxis (1% in NASONEX Nasal Spray 50 mcg group vs. % in placebo) and the overall adverse event profile was similar to that observed in the other allergic rhinitis trials.
Mometasone furoate increased chromosomal aberrations in an in vitro Chinese hamster ovary-cell assay, but did not increase chromosomal aberrations in an in vitro Chinese hamster lung cell assay. Mometasone furoate was not mutagenic in the Ames test or mouse- lymphoma assay, and was not clastogenic in an in vivo mouse micronucleus assay and a rat bone marrow chromosomal aberration assay or a mouse male germ -cell chromosomal aberration assay. Mometasone furoate also did not induce unscheduled DNA synthesis in vivo in rat hepatocytes.